Icom IC-475H Instruction Manual page 42

e PA unit fuse >
d х»
replacement 1 c
> 8-2 й
Shield Plate
(4) Resetting the internal
microprocessor
(Б) Automatic protector circuit
If the transceiver becomes dusty or dirty, wipe it clean with a dry,
soft cloth. Avoid the use of strong cleaning agents such as benzine
or alcohol as they may damage the surfaces.
If the fuse blows or the transceiver stops functioning, track down
the source of the problem if possible, and replace the damaged fuse
with a new, rated fuse.
PA unit fuse ............ Ян F.G.M.B. 125У ЗА
ОС саЫе..... ЯМ TEE ......... 20A
e DC line fuse
replacement
The 1С-475Н uses an advanced, highly reliable microphocessor
chip. The purpose of the battery is to provide power to the micro-
processor so it retains all memory information during power failures,
or when the unit is unplugged or turned OFF.
e The usual life of the backup battery exceeds five years. It is advisa-
ble to monitor the battery carefully and replace it if there are
repeated cases of display malfunction.
eThe transceiver transmits and receives normally if the backup
battery is exhausted but the transceiver cannot memorize fre-
quencies.
Occasionally, the FREQUENCY DISPLAY may display erroneous
information either during operation or when first applying power.
This may, for example, be due to an external cause such as static
electricity.
When this sort of problem is encountered, turn OFF the power to
the 1C-475H, wait for a few seconds and turn ON the power again.
if the problem persists, perform the following procedure.
1) Turn power OFF, hold down the [M-CL] SWITCH, and turn
power ON.
2) The IC-475H is now reset.
A builtin protector circuit automatically holds transmit output
power at half of maximum power when operating the transceiver
continuously at maximum power. This protects the final transistors
from overheating.
-39-